Centering for concrete work.



L. G. HALLBERG.

OBNTERING FOR commn'rn WORK.

APPLICATION FILED FEBJS, 1907.

v Patentd Jan. 17, 1911.

2 SHEETS-SHEET l.

L. G. HALLBERG.

GENTERIN G FOR CONCRETE WORK.

APPLICATION FILED IEB.13, 1907.

982,055, Patented Jan. 17, 1911. 81 e f /E ZBHEBT-S-SHEET 2-.

E I? A .l z 7 .f z fi 5 0 d- 1 o e n. f g 1 I a q 4 5. E j Z4, IV V n/ l Z 11 5L5? f an adjustable centering for use in making certain features 0 my invention; Fig. 2 is.

FFICE;

LAWRENCE G. HALLBERG, Q1 CHICAGO, ILLINOIS.

CENTERING FOR CONCRETE WORK. 7

. Specification of Letters Patent.

Patented Jan. 17, 1911.

Applicationfil ed February 13, 1907. Serial No..357,124.

To all whom it may concern:

Be it knowmthat' I, LAWRENCE G. HALL BERG, a citizen of theUnited States, residing at Chicago, in the countyof Cook and State of Illinois, have invented certain new and useful Improvements in Centerings for Concrete Work, of. which .the' following is a specification, reference being had' therein.

' centering for the pillars is made in sections to the accompanying drawings.

My invention relates to centerings for concrete structures, and its object is to provide concrete .floors, columns, and partitions or girders.

The invention consists in thearra'ngement and constructionfof parts, as hereinafter described and pointed out in the' claims In the accompanying drawings which illustrate an embodiment'of my invention.. Figure 1 is a top plan view of parts employed for makin a eentering'embodying a View partly in elevation and partly in section on thevline 22 of Fig. 1 illustrating a construction which may be employed in certain details; Fig. 3 is a detail view partly" in side elevation and'partly in section showing one of the sides of-the centering for making walls or girders; and Fig. 4 isa cross-sectional. vview of parts of the centering for lmiki-ng columns or pillars, and which may be employed in connection with the other parts.

l In constructing concrete floors, columns,

and walls or girders suitable supports are necessary to receive the material and hold it in place while setting, and as heretofore constructed these supports have been of such construction that they were merely temporary and capable of use in one instance and'were necessarily disassembled and destroyed when taken apart, so that practically a new one had to be constructed for each floor panel or slab, column, and wall or girder. In the employment of my invention I provide a centering which is in knockdown form so that the same parts may be used over and over again, andwhich also is adjustable in order to accommodate or provide for different sizes or dimensions in the floor-panels or slabs, columns, and walls or girders.

In the-accompanying drawings Fig.

shows a detail of that part of the centering adapted to be filled with concrete to form columns or'pillars A, and in the preferred cmbodimentof the invention itis made adjustable in size or cross-section, it of course being obvious that it may be made ofany suitable length to accommodate itself to the distances between the floors or may be made up of several shorter lengths for this pur' pose or that a single short length may be successively employed as the pillar is built up. As shown in. Fig. 4, the frame of the a, which may be of any suitable contour.

The adjacent sections are provided with ears (1 which are suitably connected together-by tering will be varied according to the num-- her more or less of the filling strips introduced between the sections, these strips preferably being clamped between the ears. Suitable c'lamping strips a may be employed, and the ends of the ears are preferably flanged as at a to form seats for the strips. The strips reinforce the sections and prevent them from springing or bulging out between the bolts and serve as stanchions for ends of girders above.

The reference letters B and B indicate suitable stanchions which are adjustable in any suitable manner in order to provide for erecting a centering thereon at different elevations according to the difl'erent heights of the floors, etc. In the form' shown the stanchions are made in sections, the lower sections?) being provided witha series of seats, such as holes or perforations, b to receive the bolts or i'bds b passing through holes 7) in the upper sections. The upper section of each stanchion in the form consists of an oppositely disposedpair of pieces bf of suitable length and of substantially the same width as the associated section '6, arranged upon opposite sides of the lower section and provided intermediate theirends with cross-pieces or collars b srrrounding the u per end of the-lower section. v

It is obvious that the sections of the stanchions may be adjusted to provide various heights and lengths by adjusting the bolts in different holes in the sections. The upper sections of the stanchions B carry lateral brackets which in the form shown consist of suitable cross-arms b which are connected to the upper ends of the upper sections inv any suitable manner and are braced by.

20 same .length so 25 and .shipping.

means of suitable supports b which are seated by shoulders at their lower ends upon the collars b to which they are suitably fastened. v 1 5 The stanchions are erected at suitable distances apart and their brackets support or carry joists C. These joists are ad ustable in length and for this purposeqpreferably are composed of telescopic sections; to this end I provide a suitable pair of'lengths or pieces of material 0, which are arranged parallel and suitably spaced apart widthwise by any means such as the collars 0 to form an-intermediate space adaptedto receive an associated section 0 consisting of a suitable length or piece of material. The-lateral arts 0 form the outer section of each joist and the part 0 forms the inner section, these parts being preferably approximately of the that when the sections are entirely telescoped the section 0 is within the. outer section composed of the parts 0, whereby the length of the joist is reduced to a minimum to expedite handling, packing The sections may be moved upon each 0 her, as by drawing out or pushing in the interior section 0 which slides through'the collars 0, in order to adjust the length of the joist; in practice the outer section is provided with a pair ably spaced apart near its outer end in order to render the joist rigid. at its joint, although of course this may be obtained by making the collar at the end of the outer section wide enough to provide an extended bearing for the inner section. By this construction an adjustable joist is provided which may be givesa firm unyielding support in any posl- 40 tion of adjustment.

A series of cross-beams D are provided, adapted to rest upon the joists, as shown in Fig. 2. These cross-beams are also constructed in adjustable lengths and preferably in the same manner as the joists; the outer section is composed of a pair of pieces 01 -suitably spaced apart and held in position bycollars d and adapted to receive an associated inner Section (P which fills the space between the sections d and is movable back and forth within the collars for the purpose of adjusting the length of the cross-beam. I

The joists and cross-beams provide for thefloor-panels or slabs a centering which is in knockdown form and which may be adjusted longitudinally and panels or slabs of varying size or dimensions.

When it is used a suitable temporary cover 'or floor E is laid upon the cross-beams to d '5 ,form. a supportfor the cementitious material while setting.

*In practice it is preferable to support the strips of sheet metal composing the temporary floor at every threeor four inches, and for this urpose I provide floor-slats of collars suit-- of any suitable length and.

the floor-slats are placed able in length'the floor-panel transversely to' providewhich are carried by and run transversely of the cross-beams D, being parallel with the joists C and adapted to fill the spaces between the joists and beams for the purpose of affordi-ng moreextended support for the sheet-iron 7 sections or strips E employed in making the temporary floor for the concrete. The slats are preferably adjustable in length and for this purpose are composed of relatively sliding ormoving sections 6 and e.

rovide for more conveniently and quickly handling the slats I in banks or groups, 'each bank preferably being of such dimensions as to provide a' In order to '75 prefer to arrange them suitable filler between each pair of adjacent so For this purpose I connect a plurality of slats together in parallel formation by suitable cross-pieces e which are attached by screws or other suitable means to the under edges of the slats.

joists.

these cross-pieces which are adapted to receive and support the associated slats com prising the other side of each bank as clearly shown in Fig. 1. bank of floor slats may likewise be adjusted to any suitable length.

' In using, the device as thus-far described One side of each bank will be provided with trim or more of a By this construction each a series of stanchions are erected to conform to the general outline or contour of the struc-.

ture desired. In the form shown in Fig. 1 the centering is employed for the purposeof making aso used the stanchions will be arranged at floor and .it is obvious that when suitable intervals along'the length and width ofthe space occupied by the floor. The

joists'C are then placed in position, preferably along the len h or longest line of the structure, and the cross-beams D are placed in position 'transversely'upon the joists as clearly shown in Figs. 1 and 2, after which "inposition upon the cross-beams and parallel. to the line of the joists, as clearly shown in Fig. 1. When the parts thus in position the sheet iron strips Eforming the temporary terialare placed in position upon the-floorslats, and the concrete material is then spread upon the floor in the usual'manner. It is obvious that as the joists G, cross-beams D, slats and sheet-iron strips are all adjustcentering may be employed for various sizes of floor-panels or slabs, the dimensions of which may be varied by altering the length of the joists or cross-beams, or of both. It is of course understood that. the floors or partitions are supported or carried by any suitable permanent supports with which the floor-centering is associated temporarily, and to which the material of the floors or partitions is suitably connected. For example, in constructing a floor the panel=centering may be erected to come' fiush of the floor-panel centering are floor for the concrete main place; while the material for the second floor is setting the first panel-centering is removed and placed in position-for the third floor, and while the material of the third floor is setting the second panel-centering is moved to the fourth floor, this process being repeated for asmany stories or levels as desired, the knockdown form of the centering providing for its rapid assembling aii'd dis-assembling for repeated use at different elevations. Wheresuitable pillars or columns are employed at intervals substan tially the same operations are followed, the centering being erected in association with the pillars or supports and flush with their successive elevations substantially in the manncrillustrated in Fig.1, the knock-' down form of the centering providing for its use successively and its adjustability providing for its use in locations where the spaces between the pillars or. supports vary. I It is obvious that each of the stanchions may carry brackets of such form that adjacent sections ofthe centering may be carried by the same stanchions, and for this purpose the brackets maybe providedat each end in any form adapted to support an associated pair of joists as illustrated 'in Fig. 2. In this form the cross-beams of adjacentportions or, sections of the centering may extend beyond their associated joists so as to abut or approach more or less, as by extending theopposite cross-beams D of Fig. 2 more or less toward each other.

The general arrangement described may be utilized for the purpose of providing a partition -or girder centering extending across between the main walls or supports, as between adjacent pillars A. For this purpose the brackets are provided at their ends with upwardly extending portions or risers so that when the joists and cross-- beams are placed thereon in the manner shown the structure will provide a trough ()1=Cll ln110l substantially U-shapc in crosssection intermediate adjacent sections or portions of the panel-centering and extending between adjacent supports, as the columns A. A centering for the material of the girder is constructed in this U-shaped trough, and preferably is adjustable both longitudinally and transversely. In the form shown the sides and bottom of the centering are composed of strips or pieces of suitable length, and alternate pieces f are secured to suitable collars f, and the intermediate'pieces or sections are secured to corresponding collars P, the arrangement being such that the sections f and f slide longitudinally upon each other in order that the length of the centering may be adjusted to accommodate itself to different lengths or distances between adjacent columns or supports. Furthermore, in order to provide for making the girders of different width or thickness, the collars fare preferably see tional and adjustable in size; this is suitably accomplished byextending the base f of one side of the collar and providing it with perforations f at suitable distances apart and adapted to receive a screw 7" or other suitable fastening means upon the other side or portion of the collar, as clearlyshown in Fig. 2. The girder-centering is provided with at suitable lining f which may be in sections and correspondingly adjust-able in any suitable manner. When the centering is adjusted longitudinally it may be held by any suitable means, as a screw on a collar f passing into a strip 7", the collars being shown asprovided with holes f for this purpose. By means of such centering a partition or girder of suitable length and width may be constructed simultaneously and integrally with the floor.

At the ends of the girder-centering the collars are made somewhat deeper than the intermediate ones, and rest upon the clamping strips and filling pieces of the mold for the column, asshown in Fig. '3. The ends of the bottom strips terminate short of the sides, and inclined brackets connect the ends of the two extreme bottom strips to the end-collars and support an inclined fillingpiece f upon, which an inclinedextension f of the lining rests. The space between the ends of the two centerings is closed by an extension a of one of the sections of the column-mold.

The stanchions B are provided at their tops with intermediate pieces 7)" and with side-pieces If to widen their tops to receive the joists and also to hold the joists in place, suitable collars or strips 7) being employed to secure the several parts.

In the construction shown in Fig. 1 four pillars A are illustrated arranged at suitable distances to produce a rectangular form of floor, and upon the completion of the centerings for the pillars the panel centering and girder centering are set up at a suitable height. After they are in position the concrete material may be placed in the centerings for the pillars, in the centerings for the girders and spread over the floor of the panel -centering so that suitable pillars, girder and floor panel or slab are simultaneously and integrally constructed. As all parts are constructed in knockdown form they may be disassembled and taken apart with case and rapidity and without the necessity of removing any nails or temporary I cross-beams, said slats being arranged in fasteners whereby the parts if made of wood would be rapidly destroyed, and they may again be easily and readily assembled for the next or successive use.

Owing to the adjustability of the stanchions the centerings may be set at any elevation for floors of difierent height, andowing to the adjustabilit of the vjoistsand cross-beams they may e made in suitable sizes or areas, the floor-slats being likewise adjustable for this purpose. The girder centerings may be correspondingly adjusted to provide girders of length corresponding to the distances between the columns or otherv supports, and they'may also be ad'usted transversely .to provide girders of di erent widths.

Having described my invention what I' claim as new and desire to-secure by Letters Patent of the United States, is-- 1. In a device of'the classdescribed, an adjustable structure comprising a series of adjust-able joists, a series of adjustable crossbeams arranged transversely on the joists, a series of adjustable fioor-slats on the crossbeams, a sheet metal covering, and a longitudinally adjustable girdercentering of greater depth than the width ofthe joists, beams and slats.

2. In a device of the class described, a series of adjustable stanchions, a series of adjustable joists carried thereby, a series of adjustable cross-beams carried by the joists, a series of adjustable floor-slats carried by the banks or groups, and longitudinally adjustable girder-centerings carriedon the stanchions.

3. In a device of the class described, a se ries of stanchions, a series of joists, each joist composed of telescopic sections, a'series of cross-beams arranged transversely of the joists, each cross-beam being composed of telescopic sections, a series of floor-slats arranged transversely of the cross-beams, the slats being connected in' adjustable banks or groups, and a sheet metal covering.

4. In a device of the class described, adj acent floor centerings, and a girder centering comprising two sides and a bottom composed i i-strips or pieces alternately movable longitudinally with respect to each other, and collars connecting alternate strips.

, 5. In a device of the class described, adjacent floor centerings, and a girder centering having side walls and a-bottom,and a sectional collar connecting the sides and bottom, one sectionof the collar carrying one side wall and the bottom and the other section of the collar carrying the other side wall, and means to secure the sections in adjustable relation.

- In testimony whereof I aflix my signature in presence of two witnesses.

' LAWRENCE e. HALLBERGQ Witnesses:

. ELIzABnTn Monrron;

J. MoRocnn'rs, 

